Gas-burning apparatus.



PATENTBD 00T. 15, 1907.

V. W. BLANCHARD. GAS BURNING APPARATUS.

APPLIOATION FILED JAN.22,1906.

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arena Brien@ VIRGIL W. BLANCHARD, OF NEW YORK, N. Y.

GAS-BURNING APPARATUS.

Specification of Letters Patent.

Patented Oct. 15, 1907.

Application filed January 22, 1906. Serial No. 297,243.

To all 'whom il may concern:

Be it known that I, Vuren, W. BLANCHARD, of New Yorlc, in the county ofNew York and State of N ew York, have irrveirted certain new aird usefulImprove- 5 ments in Gas-Burning Apparatus; arid I hereby declare thatthe following is a full, clear, and exact description thereof, referencebeingl had to the accompanying drawings, which forni part of thisspecification.

This ilrventiorr an improved gas burning apparatus I particularlydesigned for use in heating arid cooking stoves; but also adaptable forother uses in the arts wherever gaseous fuel is available and an intenseheat is desired.

The object of the invention is to provide a heater or I burner' whereinthe gaseous fuel will be entirely consumed a n d approximately perfectconrbristiorr realized.

The principal feature of the present iriveirtioir is the novel irre-airsof supplying fresh air to the burning gases in the most advantageousmanner.

In the present invention the gases flowing upwardly through the burnerare subjected to numerous jets of air directed thereinto, both axiallyand periplrerally, the air being heated before being admitted into thegases so that complete assimilation of all the fuel elements by theoxygen in the air' is almost instantaneously realized.

I set forth in the claims the features and combina-- tioir of partsparticularly constituting the present invention, and for whichprotection is desired herein, and

refer to the accompanying drawings, forming part of this specification,for more detailed information regardiirg the structure of the apparatusembodying the irrvention; although I do not restrict myself` to theparticrilar form and dimensions of parts illustrated in the drawings.

In said drawings-Figure I is a transverse section through the bririrerand stove; and Fig. 2 is a vertical sectional elevation of the completestove and burner embodying the invention. Fig. 3 is a detail.

Under' the base A, of any suitable forni, are arranged primarymixing-tubes l provided with air inlets b at their receiving ends intowhich gas is admitted through jet heads c connected to a pipe C, towhich gas may be supplied in any suitable manner as by connecting it byarr ordinary gas-hose with thc gas fixtures in the room.

The discharge ends of tribes B project above the base into the lowerends of secondary mixing-tubes D which are provided with air inlet slotsd near their lower ends,

and with sleeves (Z2 for regulating the amount of air admitted to tubesD and D as indicated in the drawings.

The tribes D discharge into a sriperposed combustion chamber',preferably comprising a lower hood portion E having a protected roof econnecting with the lower en d of the upper part F, which forms thebrir'ner proper. The tribes D are preferably arranged so as to dischargetheir contents, partly at least, against the inclined roof a of the hoodE, instead of directly into the brrrner F. This brirner is provided witha series of annular constrictions in its throat, formed by internalannular flanges f therein, and between these ianges or constrictions inthe walls of the brirner are numerous perforatiorrs j.

The top-plate G of the stove is mountedon a cylindrical casing Gsupported on a plate G2 mounted upon standards G3 attached to base S, asshown. The form of the casing may be, of corrrse, varied to suit thedesigner and constructor of this stove. The said topplate is providedwith apertures q around the edge of the burner for the escape of heatedair from the casing, and with an annular converging collar d/ whichprojects over the said apertures and is adapted to project the heatedair into the rising products of combustion issuing from the burner.

The burner is preferably irrclosed in a jacket H which forms an airchamber 2 around the brirner into which air is admitted tlrroriglropenings or notches h at the bottom of the chamber 2. As thris fardescribed, the primary and secondary mixing-tubes, hood and burner' areconstructed substantially as shown in my application for gas burners,filed January 22, 1906, Serial No. 297 ,240, and have substantially themode of operation set forth therein.

The burner F may be suspended from the top plate G as in my saidapplication, and as illustrated in Fig. 3; it is provided with ears fwhich underlie plate Gf and are fastened thereto by bolts g6 thussuspending the burner in position.

In the present case in order to increase the amount of air supplied tothe burner during the operation of the device, I provide a central airtube or duct .I which maybe supported at its lower end upon the tubes Dand extends axially up through the hood and brirner and may be centeredat the top within the burner by a bridge piece j. This air supplyingtribe is provided with numerous perforations in its walls within theburner through which air can escape in lateral jets into the surroundingcurrent of burning gases rising in the burner. As this tribe is locatedin the center of the burner it is subjected to intense heat and therising therethrough and issuing therefrom will be correspondinglyintensely heated.

In the operation of this device gas is admitted with the air into theprimary mixing-tubes B and passes therefrom into the secondarymixing-tubes D where a further quantity of air is admitted at the slotsd and the mixtures of air and gas escape upward into the hood E beingfurther mechanically commingled by impact against the inclined roof ofsaid hood, and then they How upward through the gradually enlargingthroat of the burner F, and in passing therethrough they are alternatelyexpanded and contracted in pass- IOO ing the various constrictions f inthe throat of the burner. The combusting gases in the burner F highlyheat the Walls thereof and consequently the air in the chamber 2 Will behighly heated and Will be jetted through the perforations f inwardlyinto the'annular current of gases rising in the burner, and at the sametime heated air in pipe .l is jetted outwardly through the perfor-ationsj into the surrounding current of gases, and thus the gases aresubjected to both internal and external series of jets of heated air7whereby the most thorough and complete oxidation of all the combustibleelements is realized; and by this apparatus the most intense heat isobtainable Without ame.

Having thus described iny invention What l therefore claim as new anddesire to secure by Letters Patent thereon is:

1. The combination of a tubular burner provided with a series ofperforations in its walls for the admission of air; and with internaleonstrietions adapted to cause the alternate expansion and conti-actionof the current ot burning gases; with an air duct or pipe disposedaxially in the burner and provided with numerous perforations to admitair in jets into the surrounding; current ot' gases,

2. In combination, a burner provided with a series of internalconstrictions adapted to cause the alternate expansion and contractionof the current of burning gases; with an air heating' and supply pipearranged axially of the burner and provided with numerous perforationsto admit air in jets to the center of. the column of burning gases inthe burner.

In combination, a burner provided with a series of internalconstructions adapted to cause the alternate expansion and contractionof the current of gases therethrough and with perforations in itswallsfor admission of air into the combusting gases passing therethrough;with an air heating and supply pipe arranged axially of the burner andperforated to supply air in jets to the center of the burning current ofgases,

4. The combination of a tubular burner provided with perfor-ations inits walls for the admission'of air circumferentially around the currentof burning gases and with internal projections to arrest the flow ofgases and cause their alternate expansion and contraction in flowingtherethrough; with an air heating chamber surrounding the burner tosupply air to the perforations, and an air heating and supply pipearranged axially of the burner and perforated to admit air into thesurrounding gases, and means for supplying combustible mixtures of gasand air to the burner.

5, The combination of a tubular tapered burner provided with a series ofinternal constrictions adapted to cause the alternate expansion andcontraction of the burning gases, and with numerous perforations in itswalls intermediate the constrictions for the admission of aircireumferentially around the current of burning gases, and an airheating chamber surrounding the burner to supply air to theperforations; with a perforated air heating and supplying pipe arrangedaxially of the burner, and means for supplying combustible mixtures ofgas and air to the burner.

G. The combination of the casing, a tubular burner suspended thereinhaving annular constrictions in its throat adapted to cause thealternate expansion and contraction of the burning gases passingtherethrough and perforations in its Walls to admit air thereto, a hoodon the lower end of said burner7 and a perforated air supply pipearranged axially of said burner and hood.

7. The combination of a easing, a tubular burner therein having a seriosof annular constrictions in its throat adapted to cause the alternateexpansion and contraction of the burning gases passing therethrough andalso having air inlet perforations in its Walls and gradually enlargingfrom bottom to top, a hood on the lower end of said burner, an airheating jacket surrounding said burner, secondary mixing tubes arrangedto discharge into said hood, an air heating pipe extended axially intosaid burner and perforated for the escape of air thereinto, and meansfor supplying gas and air to -said mixing tubes.

In testimony that I claim the foregoing as my own, I atlix my signaturein presence of two witnesses.

VIRGIL W. BLANCHARD.

In presence of- .IAMns R. MANsFInnn, L. E. WITHAM.

